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%%%------------------------------------------------------------------- |
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%%% @author Ludwik Bukowski <ludwik.bukowski@erlang-solutions.com> |
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%%% @copyright (C) 2015, Ludwik Bukowski |
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%%% @doc XEP-0202: Entity Time |
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%%% @end |
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%%%------------------------------------------------------------------- |
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-module(mod_time). |
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-author('ludwik.bukowski@erlang-solutions.com'). |
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-behaviour(gen_mod). |
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-behaviour(mongoose_module_metrics). |
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-export([start/2]). |
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-export([stop/1]). |
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-export([supported_features/0]). |
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-export([config_spec/0]). |
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-export([process_local_iq/5]). |
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-ignore_xref([process_local_iq/5]). |
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-include("jlib.hrl"). |
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-include("mongoose_config_spec.hrl"). |
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-xep([{xep, 202}, {version, "2.0"}]). |
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-xep([{xep, 82}, {version, "1.1.1"}]). |
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-spec start(HostType :: mongooseim:host_type(), gen_mod:module_opts()) -> ok | {error, atom()}. |
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start(HostType, #{iqdisc := IQDisc}) -> |
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gen_iq_handler:add_iq_handler_for_domain(HostType, ?NS_TIME, ejabberd_local, |
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fun ?MODULE:process_local_iq/5, #{}, IQDisc). |
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-spec stop(HostType :: mongooseim:host_type()) -> ok | {error, not_registered}. |
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stop(HostType) -> |
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gen_iq_handler:remove_iq_handler_for_domain(HostType, ?NS_TIME, ejabberd_local). |
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-spec supported_features() -> [atom()]. |
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supported_features() -> |
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[dynamic_domains]. |
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-spec config_spec() -> mongoose_config_spec:config_section(). |
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config_spec() -> |
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#section{ |
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items = #{<<"iqdisc">> => mongoose_config_spec:iqdisc()}, |
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defaults = #{<<"iqdisc">> => one_queue} |
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}. |
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process_local_iq(Acc, _From, _To, #iq{type = set, sub_el = SubEl} = IQ, _Extra) -> |
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{Acc, IQ#iq{type = error, sub_el = [SubEl, mongoose_xmpp_errors:not_allowed()]}}; |
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process_local_iq(Acc, _From, _To, #iq{type = get} = IQ, _Extra) -> |
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{UTC, TZODiff} = calculate_time(), |
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R = IQ#iq{type = result, |
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sub_el = |
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[#xmlel{name = <<"time">>, |
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attrs = [{<<"xmlns">>, ?NS_TIME}], |
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children = |
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[#xmlel{name = <<"tzo">>, attrs = [], |
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children = [#xmlcdata{content = list_to_binary(TZODiff)}]}, |
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#xmlel{name = <<"utc">>, attrs = [], |
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children = |
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[#xmlcdata{content = list_to_binary(UTC)}]}]}]}, |
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{Acc, R}. |
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%% Internals |
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calculate_time() -> |
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SystemTime = erlang:system_time(second), |
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UTCString = calendar:system_time_to_rfc3339(SystemTime, [{offset, "Z"}]), |
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LocalString = calendar:system_time_to_rfc3339(SystemTime), |
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DateTimeLength = length(UTCString) - 1, |
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{UTCString, string:slice(LocalString, DateTimeLength)}. |